I don't believe it's a matter of getting more load points, but taking the 20 you have and "stretching" them out, by increasing the "distance" between points on the AFM axis of your map. I doubt you need to alter all of them, perhaps the top 5, obviously once something as fundamental the "scale" on you map changes the associated fueling values will need to change also.
I hope i made some sense there, if not, ignore me and wait for SK to ride to the rescue!